Simultaneous determination of arsenic and selenium in drinking water by atomic fluorescence sepectrometry

Objective:The hydride generation atomic fluorescence spectrometric method was adopted for the determination of arsenica and selenium in drinking water.Methods:The water sample was treated by HNO3 and HClO4,in the medium of 5% HCl,to enter for Thiourea and L-Ascorbic acld,to determine the fluorescent light strength by the reducer of 20% NaBH4.Results:In the best conditions of the experimentation,the detection limit,arsenic was 0.526 μg/L and selenium was 0.452 μg/L.Recovery rate of the method was 94.8%～100.3% for arsenic and 95.1%～99.0% for Selenium.Conclusion:This method is simple,fast and accurate.